T-distribution
t-distribution
60%
70%
80%
85%
Confidence Level
90%
95%
98%
99%
99.8%
99.9%
2 Tailed
1 Tailed
0.40
0.20
0.30
0.15
0.20
0.10
Level of Significance
0.15
0.10
0.05
0.02
0.075 0.05 0.025 0.01
0.01
0.005
0.002
0.001
0.001
0.0005
df
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
40
50
60
70
80
90
100
1.376
1.060
0.978
0.941
0.919
0.906
0.896
0.889
0.883
0.879
0.875
0.873
0.870
0.868
0.866
0.865
0.863
0.862
0.861
0.860
0.859
0.858
0.857
0.857
0.856
0.856
0.855
0.855
0.854
0.854
0.851
0.849
0.848
0.847
0.846
0.846
0.845
1.963
1.385
1.250
1.190
1.156
1.134
1.119
1.108
1.100
1.093
1.088
1.083
1.079
1.076
1.074
1.071
1.069
1.067
1.066
1.064
1.063
1.061
1.060
1.059
1.058
1.058
1.057
1.056
1.055
1.055
1.050
1.047
1.045
1.044
1.043
1.042
1.042
3.133
1.883
1.637
1.533
1.476
1.440
1.415
1.397
1.383
1.372
1.363
1.356
1.350
1.345
1.341
1.337
1.333
1.330
1.328
1.325
1.323
1.321
1.319
1.318
1.316
1.315
1.314
1.313
1.311
1.310
1.303
1.299
1.296
1.294
1.292
1.291
1.290
4.195
2.278
1.924
1.778
1.699
1.650
1.617
1.592
1.574
1.559
1.548
1.538
1.530
1.523
1.517
1.512
1.508
1.504
1.500
1.497
1.494
1.492
1.489
1.487
1.485
1.483
1.482
1.480
1.479
1.477
1.468
1.462
1.458
1.456
1.453
1.452
1.451
6.320
2.912
2.352
2.132
2.015
1.943
1.895
1.860
1.833
1.813
1.796
1.782
1.771
1.761
1.753
1.746
1.740
1.734
1.729
1.725
1.721
1.717
1.714
1.711
1.708
1.706
1.703
1.701
1.699
1.697
1.684
1.676
1.671
1.667
1.664
1.662
1.660
12.69
4.271
3.179
2.776
2.570
2.447
2.365
2.306
2.262
2.228
2.201
2.179
2.160
2.145
2.131
2.120
2.110
2.101
2.093
2.086
2.080
2.074
2.069
2.064
2.060
2.056
2.052
2.048
2.045
2.042
2.021
2.009
2.000
1.994
1.990
1.987
1.984
31.81
6.816
4.525
3.744
3.365
3.143
2.999
2.897
2.822
2.764
2.719
2.682
2.651
2.625
2.603
2.584
2.567
2.553
2.540
2.529
2.518
2.509
2.500
2.493
2.486
2.479
2.473
2.468
2.463
2.458
2.424
2.404
2.391
2.381
2.374
2.369
2.365
63.67
9.520
5.797
4.596
4.030
3.707
3.500
3.356
3.250
3.170
3.106
3.055
3.013
2.977
2.947
2.921
2.899
2.879
2.861
2.846
2.832
2.819
2.808
2.797
2.788
2.779
2.771
2.764
2.757
2.750
2.705
2.678
2.661
2.648
2.639
2.632
2.626
¡ª
19.65
9.937
7.115
5.876
5.201
4.783
4.500
4.297
4.144
4.025
3.930
3.852
3.788
3.733
3.687
3.646
3.611
3.580
3.552
3.528
3.505
3.485
3.467
3.451
3.435
3.421
3.409
3.397
3.386
3.307
3.262
3.232
3.211
3.196
3.184
3.174
¡ª
26.30
12.39
8.499
6.835
5.946
5.403
5.039
4.780
4.586
4.437
4.318
4.221
4.141
4.073
4.015
3.965
3.922
3.884
3.850
3.820
3.792
3.768
3.746
3.725
3.707
3.690
3.674
3.660
3.646
3.551
3.496
3.460
3.435
3.417
3.402
3.391
¡Þ
0.842
1.036
1.282
1.440
1.645
1.960
2.327
2.576
3.091
3.291
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